The Episodes They Should Have Done?

[Cap'n Crunch]

I would have liked to see a follow-up to the TNG episode "Schisms", with the clicking aliens who abduct people in their sleep.

 

[kissthestar]

The Romulan War on Enterprise
A Followup to Damage
One final TCW episode revealing future guy
An actual BOTF series finale for Enterprise
A few episodes of Voyager set after they returned home
More Mirror Universe episodes on Enterprise

I think a series set in the mirror universe would be good.